Response functions of Si(Li), SDD and CdTe detectors for mammographic x-ray spectroscopy.

In this work, the energy response functions of Si(Li), SDD and CdTe detectors were studied in the mammographic energy range through Monte Carlo simulation. The code was modified to take into account carrier transport effects and the finite detector energy resolution. The results obtained show that all detectors exhibit good energy response at low energies. The most important corrections for each detector were discussed, and the corrected mammographic x-ray spectra obtained with each one were compared. Results showed that all detectors provided similar corrected spectra, and, therefore, they could be used to accurate mammographic x-ray spectroscopy. Nevertheless, the SDD is particularly suitable for clinic mammographic x-ray spectroscopy due to the easier correction procedure and portability.

[1]  Francesco Fauci,et al.  X-ray spectroscopy and dosimetry with a portable CdTe device , 2007 .

[2]  Ricardo Andrade Terini,et al.  X-ray spectroscopy in mammography with a silicon PIN photodiode with application to the measurement of tube voltage. , 2004, Medical physics.

[3]  A. Pahlke,et al.  The spectral response of silicon X-ray detectors , 2006 .

[4]  F. Scholze,et al.  Modelling the response function of energy dispersive X-ray spectrometers with silicon detectors , 2009 .

[5]  H Kanamori,et al.  Direct measurement of mammographic x-ray spectra using a CdZnTe detector. , 2000, Medical physics.

[6]  M. Poletti,et al.  Establishment of the mammographic radiation qualities in industrial equipment: spectra determination , 2011 .

[7]  E. Wilkinson,et al.  A comparison of mammography spectral measurements with spectra produced using several different mathematical models. , 2001, Physics in medicine and biology.

[8]  Monte Carlo simulation studies of detectors used in the measurement of diagnostic x-ray spectra. , 1980, Medical physics.

[9]  MONTE-CARLO MODELING OF SILICON X-RAY DETECTORS , 2006 .

[10]  Theodore L Hopman,et al.  Simulations of Si(Li) x-ray detector response , 2001 .

[11]  M. Pereirab,et al.  Monte Carlo and least-squares methods applied in unfolding of X-ray spectra measured with cadmium telluride detectors , 2007 .

[12]  C. Bacci,et al.  The use of cadmium telluride detectors for the qualitative analysis of diagnostic x-ray spectra. , 1984, Physics in medicine and biology.

[13]  U Bottigli,et al.  Comparison of two portable solid state detectors with an improved collimation and alignment device for mammographic x-ray spectroscopy. , 2006, Medical physics.

[14]  CdZnTe detector in mammographic x-ray spectroscopy. , 2002, Physics in medicine and biology.

[15]  G. White,et al.  A quantitative explanation of low-energy tailing features of Si(Li) and Ge X-ray detectors, using synchrotron radiation , 1998 .

[16]  J. Sempau,et al.  PENELOPE-2006: A Code System for Monte Carlo Simulation of Electron and Photon Transport , 2009 .

[17]  M. Mesradi,et al.  Experimental characterization and Monte Carlo simulation of Si(Li) detector efficiency by radioactive sources and PIXE. , 2008, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[18]  J. Sempau,et al.  Experimental benchmarks of the Monte Carlo code penelope , 2003 .

[19]  G. Johnson,et al.  Voltage waveform effects on output and penetration of W- and Mo-anode mammographic tubes. , 1981, Physics in medicine and biology.

[20]  Satoshi Miyajima,et al.  Thin CdTe detector in diagnostic x-ray spectroscopy. , 2003, Medical physics.